## Hipparchus |

Hipparchus | |
---|---|

Born | c. 190 BC |

Died | c. 120 BC (around age 70) |

Occupation |

**Hipparchus of Nicaea** (*Hipparkhos*; c. 190 – c. 120 BC) was a ^{[1]} but is most famous for his incidental discovery of ^{[2]}

Hipparchus was born in ^{[3]} Hipparchus is considered the greatest ancient astronomical observer and, by some, the greatest overall astronomer of ^{[4]} He developed trigonometry and constructed trigonometric tables, and he solved several problems of

- life and work
- babylonian sources
- geometry, trigonometry, and other mathematical techniques
- lunar and solar theory
- astronomical instruments and astrometry
- star catalog
- precession of the equinoxes (146–127 bc)
- geography
- legacy
- monument
- editions and translations
- references
- further reading
- external links

There is a strong tradition that Hipparchus was born in Nicaea (Greek *Νίκαια*), in the ancient district of

It is not known what Hipparchus's economic means were nor how he supported his scientific activities. His appearance is likewise unknown: there are no contemporary portraits. In the 2nd and 3rd centuries

Relatively little of Hipparchus's direct work survives into modern times. Although he wrote at least fourteen books, only his commentary on the popular astronomical poem by * Geography* and

Hipparchus was amongst the first to calculate a ^{[6]} but he abandoned his work because the calculations showed the orbits were not perfectly circular as believed to be mandatory by the science of the time. As an astronomer of antiquity, his influence, supported by ideas from Aristotle, held sway for nearly 2000 years, until the

Hipparchus's only preserved work is *Τῶν Ἀράτου καὶ Εὐδόξου φαινομένων ἐξήγησις* ("Commentary on the Phaenomena of Eudoxus and Aratus"). This is a highly critical commentary in the form of two books on a popular ^{[7]} Hipparchus also made a list of his major works, which apparently mentioned about fourteen books, but which is only known from references by later authors. His famous star catalog was incorporated into the one by Ptolemy, and may be almost perfectly reconstructed by subtraction of two and two thirds degrees from the longitudes of Ptolemy's stars. The first trigonometric table was apparently compiled by Hipparchus, who is consequently now known as "the father of trigonometry".

Hipparchus was in the international news in 2005, when it was again proposed (as in 1898) that the data on the ^{[8]} in the more ambitious 2005 paper, thus no specialists in the area accept its widely publicized speculation.^{[9]}

*On the Face in the Moon*, was reporting some physical theories that we consider to be ^{[10]} he goes on to say that Newton may have been influenced by them.^{[11]} According to one book review, both of these claims have been rejected by other scholars.^{[12]}

A line in Plutarch's *Table Talk* states that Hipparchus counted 103049 compound propositions that can be formed from ten simple propositions. 103049 is the tenth ^{[13]}^{[14]}

Other Languages

Afrikaans: Hipparchos

العربية: أبرخش

asturianu: Hiparco de Nicea

azərbaycanca: Hipparx

беларуская: Гіпарх

беларуская (тарашкевіца): Гіпарх

български: Хипарх

català: Hiparc de Nicea

čeština: Hipparchos

dansk: Hipparchos

Deutsch: Hipparchos (Astronom)

Ελληνικά: Ίππαρχος ο Ρόδιος

español: Hiparco de Nicea

Esperanto: Hiparko

euskara: Hiparko Nizeakoa

فارسی: ابرخس

français: Hipparque (astronome)

Gaeilge: Hioparcas

galego: Hiparco

한국어: 히파르코스

հայերեն: Հիպարքոս

हिन्दी: हिप्पारकस

hrvatski: Hiparh

Bahasa Indonesia: Hipparkhos

interlingua: Hipparcho

italiano: Ipparco di Nicea

עברית: היפרכוס

ქართული: ჰიპარქე

қазақша: Гиппарх

Kiswahili: Hipparchos wa Nikaia

kurdî: Hîparxos

Кыргызча: Гиппарх

latviešu: Hiparhs

Lëtzebuergesch: Hipparchos vun Nicäa

lietuvių: Hiparchas (astronomas)

Lingua Franca Nova: Hiparco

magyar: Hipparkhosz (csillagász)

македонски: Хипарх

Malagasy: Hipparque

മലയാളം: ഹിപ്പാർക്കസ്

مصرى: هيبارخوس

Nederlands: Hipparchus (astronoom)

日本語: ヒッパルコス

norsk: Hipparkhos (astronom)

norsk nynorsk: Hipparkhos

oʻzbekcha/ўзбекча: Gipparx

پنجابی: ہپارخس

polski: Hipparchos z Nikei

português: Hiparco

română: Hiparh

русский: Гиппарх

Scots: Hipparchus

sicilianu: Ipparcu

Simple English: Hipparchus

slovenčina: Hipparchos z Nikaie

slovenščina: Hiparh

српски / srpski: Хипарх са Родоса

srpskohrvatski / српскохрватски: Hiparh

suomi: Hipparkhos

svenska: Hipparchos

Tagalog: Hiparco

தமிழ்: ஹிப்பார்க்கஸ்

ไทย: ฮิปปาร์คอส

Türkçe: Hipparkos

українська: Гіппарх

اردو: ابرخس

Tiếng Việt: Hipparchus (nhà thiên văn)

Winaray: Hiparco han Nicea

中文: 喜帕恰斯